Patent GB-191324993-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: JAMES REGINALD WILLIAM
IPC: B41J29/50
Filed: 1913-11-03
Granted: 1914-06-04
Abstract: 24,993. James, R. W., [Remington Typewriter Co.]. Nov. 3. Line-locking devices; alarms; margin stops.-Relates to line-locking and alarm mechanism for machines in which the printing- mechanism is arranged to shift for change of case and comprises the provision of a locking-bar which is pivoted on the shift-frame and is adapted to lock a shifting part of the printing-mechanism in all case positions. The invention is shown applied to a type-lever machine of the kind described in Specifications 24,989/13 and 24,990/13, in which type-levers 33 and sub-levers 39 are mounted in a shift-frame 36 which is pivoted at 37 to the frame-posts 5. The flanged locking-bar 47 is adapted to engage the sub-levers 39 and is secured to arms 49 which are pivoted at 50 to the shift-frame 36. The righthand arm 49 is extended and formed with a finger 52 engaging the slotted end 53 of a lever 54 which is pivoted at 55 to the top-plate 10 and is formed with a slotted end 56 engaging a pin 57 on a stop bar 58 which is mounted with rotary and slight longitudinal freedom in the frame-members 4. The pin 57 is extended to form a resilient stem 64 carrying a bell-hammer 63, the stem being held by a spring 67 against a stop 68, which normally holds the bell-hammer just clear of the bell 65. The stop-bar carries adjustable stops 70, 87 and a non-adjustable stop 94 adapted to engage stopnoses 82, 83 on a lever 80 which is pivoted at 81 to a rail 16 on the platen-carriage 12 and is formed with a finger part 84 and with a supporting-lug 86 held in engagement with the rail by a spring 85. The stop 70 consists of a channelled member which is of greater depth than the stop-bar and is formed with ears 71, 72, 73 to engage the front of the stop-bar and with a tooth 78 which is held in engagement with locking-notches 69 by a spring 77 arranged between the stop-bar and the top of the stop. The stop can be released by being depressed, the top of the stop being preferably roughened to receive the finger. The stop 70 is formed with a bell-ringer ear 74, and the ear 73 is offset to form a line-lock stop. The stop 87 is constructed in the same manner as the stop 70 and is formed with a margin-stop nose. The stop 94 is secured to the stop-bar and is formed with a final line-lock stop 93. In operation, when the carriage approaches line-end, the stop-nose 82 wipes along the inclined edge 75 of the ear 74 and rocks the stop-bar and thereby lifts a bell-hammer 63, the bell-hammer being actuated by the spring 67 when the stopnose 82 has escaped from the ear 74. After the ringing of the bell, a few more steps of the carriage bring the stop-nose 83 into contact with the stop 73, the bar 58 being thereby moved to the left against the pressure of a spring and the locking-bar being swung over the sub-levers. For writing in the margin, the finger 84 is depressed so as to raise the stop-nose 83 above the level of the stop 73, and the stop-bar spring then moves the stop-bar to the left with the stop 73 underneath the stop-nose 83. The carriage can then be stepped to the left until the stop-nose 82 engages the stop 93, whereupon the stop-bar is again moved to the left and the locking-bar operated. The ear 74 and the stop 73 are formed with inclines 76, 73Î over which the stop-noses 82, 83 move idly during the return of the carriage. At the end of this movement the stop-nose 83 engages tLe marginstop nose on the stop 87 and arrests the carriage. For writing in the margin, the stop-nose 83 is raised by depressing the finger 84. The stop 87 is formed with an incline 90 over which the stop-nose 83 can move idly when the carriage is moved to the normal position after the margin has been written in